S.D. Codified Laws § 58-33-60
Current with legislation signed by the governor on or before 3/6/2024
A notice of cancellation of insurance coverage by an insurer shall be mailed or delivered by the insurer to the named insured at least twenty days before the effective cancellation date and shall be accompanied by a written explanation of the specific reasons for the cancellation.
SDCL 58-33-60